Question

an athlete completes a circular track of diameter 200m in 20 sec .calculate the distance travelled by him and the magnitude of the displacement of the athlete at the end of 1 m and 10 seconds?

Answer 1

rounds covered in 1min 10 sec=70/20=3.5rounds
the distance traveled will be=
$35 \div 10 \times 22 \div 7 \times 200$
the displacement after 3 rounds will be 0m but after 3.5 round the displacement will be =the diameter of the circle=200m